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Total record count: 6269.

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Eng ID Term Definition
161
angular acceleration
See ACCELERATION.
162
angular distance
The angular difference between two directions, numerically equal to the angle between two lines extending in the given directions. The arc o... more
The angular difference between two directions, numerically equal to the angle between two lines extending in the given directions. The arc of the GREAT CIRCLE joining two points, expressed in angular units.
163
angular distortion
See DISTORTION.
164
angular parallax
See PARALLACTIC ANGLE.
165
angular rate
See SPEED: ANGULAR.
166
angular speed
See SPEED.
167
angular velocity
See SPEED: ANGULAR.
168
annotation
Any marking on illustrative material for the purpose of clarification, such as numbers, letters, symbols, and signs.
169
annual aberration
See ABERRATION OF LIGHT.
170
annual change
See MAGNETIC ANNUAL CHANGE.
171
annual inequality
Seasonal variation in water level or tidal current speed, more or less periodic, due chiefly to meteorological causes.
172
annual parallax
See PARALLAX.
173
annual variation
See MAGNETIC ANNUAL VARIATION.
174
annular eclipse
See ECLIPSE.
175
anomalistic month
See MONTH.
176
anomalistic year
See YEAR.
177
anomaly
Deviation from the normal or natural characteristics of a PHENOMENON. Abnormality. In ASTRONOMY, true anomaly is the angle at the SUN betwee... more
Deviation from the normal or natural characteristics of a PHENOMENON. Abnormality. In ASTRONOMY, true anomaly is the angle at the SUN between lines connecting the SUN with a PLANET and with the PLANET's PERIHELION. Mean anomaly and eccentric anomaly are also considered.
178
anomaly: gravity
See GRAVITY ANOMALY, BOUGUER ANOMALY, FREE AIR ANOMALY, ISOSTATIC ANOMALY.
179
anomaly: magnetic
See LOCAL MAGNETIC DISTURBANCE.
180
Antarctic circle
The GEOGRAPHIC PARALLEL having a south LATITUDE equal to the complement of the DECLINATION of the WINTER SOLSTICE (latitude = 66° 33' S appr... more
The GEOGRAPHIC PARALLEL having a south LATITUDE equal to the complement of the DECLINATION of the WINTER SOLSTICE (latitude = 66° 33' S approximately).